Utils.h

Go to the documentation of this file.

#ifndef INCLUDE_HUEPLUSPLUS_UTILS_H
#define INCLUDE_HUEPLUSPLUS_UTILS_H

#include "json/json.hpp"

namespace hueplusplus
{
namespace utils
{
namespace detail
{
// Forward declaration
template <typename KeyT, typename... Paths>
nlohmann::json safeGetMemberHelper(const nlohmann::json& json, std::size_t index, Paths&&... otherPaths);

inline nlohmann::json safeGetMemberHelper(const nlohmann::json& json)
{
    return json;
}

template <typename KeyT, typename... Paths,
    std::enable_if_t<!std::is_integral<std::remove_reference_t<KeyT>>::value>* = nullptr>
nlohmann::json safeGetMemberHelper(const nlohmann::json& json, KeyT&& key, Paths&&... otherPaths)
{
    auto memberIt = json.find(std::forward<KeyT>(key));
    if (memberIt == json.end())
    {
        return nullptr;
    }
    return safeGetMemberHelper(*memberIt, std::forward<Paths>(otherPaths)...);
}

// Needs to be after the other safeGetMemberHelper, otherwise another forward declaration is needed
template <typename... Paths>
nlohmann::json safeGetMemberHelper(const nlohmann::json& json, std::size_t index, Paths&&... otherPaths)
{
    if (!json.is_array() || json.size() <= index)
    {
        return nullptr;
    }
    return safeGetMemberHelper(json[index], std::forward<Paths>(otherPaths)...);
}
} // namespace detail

bool validatePUTReply(const std::string& path, const nlohmann::json& request, const nlohmann::json& reply);

bool validateReplyForLight(const nlohmann::json& request, const nlohmann::json& reply, int lightId);

inline bool floatEquals(float lhs, float rhs)
{
    return std::abs(lhs - rhs) <= 1E-4f;
}

template <typename... Paths>
nlohmann::json safeGetMember(const nlohmann::json& json, Paths&&... paths)
{
    return detail::safeGetMemberHelper(json, std::forward<Paths>(paths)...);
}

} // namespace utils

namespace detail
{
template <typename T>
class MakeCopyable : public T
{
public:
    // Make copy constructor and assignment operator public
    using T::T;
    using T::operator=;
};
} // namespace detail
} // namespace hueplusplus

#endif